The invention is to offer a gas mist inhaler which makes only one part of the gas mist inhaler disposable for ensuring hygiene as well as realizing economization. The gas mist inhaler comprises a gas supply means 30 of supplying oxygen, carbon dioxide, or a mixed gas of oxygen and carbon dioxide a gas mist generating means 40 which has a connecting portion 45 connected to the gas supply means 30, a liquid storage of storing a liquid, a nozzle supplied with the gas, a liquid suction pipe of sending the liquid to the tip of the nozzle, a collision member of colliding the liquid blown up by a gas stream from the nozzle therewith to convert it into a gas mist, a cylindrical gas inlet leading the gas till the upper portion of the nozzle, and a donut-shaped gas mist outlet collecting and discharging the gas mist and an inhalation member 50 connected to the gas mist generating member 40 and having an inhalation port 53 for enabling to inhale the gas mist into a living organism, and wherein the gas mist generating means 40 is structured such that at least the liquid storage is made replaceable with others, and is disposable.